[P]rint buyers started demanding that printers adhere to method (A), they prefer predicable “mediocrity” over “we can in theory do better, but in practice we have no process control and are inconsistent”.
In addition to printers turning their craft into a commodity based on price, now print buyers are also wishing a commodity product, based on consistent results and price.
Stephen Marsh
A fair enough analysis of where we are.
The hard part is that we are often quantifying unknowns and unknowables.
Yes, we can have viewing booths and everything else that can make a "system"... but if there is a single deviation from the system such as a request of "I'd like it a little hotter in the red"... the concept of "system" goes right out the window.
How many designers would bet their livelihoods on a measurement-based request of "Increase the magenta 0.05 and run it"? No, no, no, most would want to re-check... which implies that the system
approximates meeting the desires of the designer.
This is not machine-tool making, where a part fits or does not and where measurement actually has a correlation with suitability for use.
I have seen far too many instances in many shops where "hitting the numbers" produced a substandard product, and a creative and experienced team of pressmen and prepress folk produced a minor miracle by disregarding the exact numbers.
It is VERY apparent that color analysis does not lead to "good color"... there is no linear relationship. (After all, we still know so little about how each person perceives color: but we do know when a nut does not thread onto a bolt.)
I suppose I could summarize it simply: quantification of quality must be in units that mean something intrinsic to the suitability of the end product, not in theoretical units that are of secondary or lower importance. (As a boss of mine used to say: "We sell the picture, not the color bar.") Unfortunately, in the printing trade we are unable to quantify "good face colour"; we can only measure (so it seems) the paper that must be cast into the wastebin.